Edge setting machine



Jan. 2, 1940. w, HAMANN 2,185,504

EDGE SETTING MACHINE Filed Nov. 18, 1937 4 Shqets-Sheet 1 X I l (D Q): Q 4 Zul J1. 16- b! 4 ,0

, VEN TEL? 1940 w. HAMANN 2,185,504

EDGE SETTING MACHINE Filed Nov. 18, 1957 4 Sheets-Sheet 2 Fig." 2.

Fig? 5.

. v i J Maw #MM Jan. 2, 1940. w. HAMANN 2,185.504

EDGE SETTING M ACHINE Filed NOV. 18, 1957 4 Sheets-Sheet 3 Ti g3.

M/EA/TUQ Jan. 2, 1940. w. HAMANN EDGE SETTING MACHINE Filed Nov. 18, 1937 4 Sheets-Sheet 4 Fig.3

Patented Jan. 2, 1940 UNITED STATES PATE T EDGE SETTING MACHINE William Harnann, Irondequoit, N.- Y., assignor to United ShoeMachinery Corporation, Borough of Flemington, N. J., a corporation'of New Jersey Application November 18, 1937, Serial No. 175,293

11 Claims. l. 122-78 This invention relates to finishing machines and is illustrated as embodied in a machine for burnishing or setting edges of soles.

In edge setting machines it is desirable to oscillate the setting tool at a f very high speed. However, it is not possible to obtain as high a speed asisdesired in the machines now available due' to the excessive vibration of these maobject of this invention to reduce the mass of the moving parts in edge setting machines so as l to reduce the vibration of these parts and thus enable the machine to operate at-a higher speed.

With this object in view, the heavy devices used in manyprior machines for yieldingly resisting axial and rotative movement of the tool holders has been dispensed with and, in the illustrated machine, light springs located adjacent to the inner end of the tool holders have been substituted therefor.

In finishing machines in which the tool holder is rotatably mounted on an oscillating shaft so as to permit the operator to bring different tools on the tool holder into an operative position, a

certain slight amount of clearance has tobeprovided between the tool holder and the shaft in order to permit the relative rotation of these members. After the machines have been in use for a time the clearance between the interfitting parts of thetool holder and shaft increases due to the wear on these parts resulting from their movement relatively to one another. It has been found that the relative movement of the tool holder andioscillating shaft' which is permitted by the clearance between "the interfittingparts of these members results in considerable vibration when they are oscillated at high speeds. Ac-

cordingly, it is a further object of this invention to eliminate this vibration by eliminating the clearance between the interfitting parts of the tool holder and the oscillating shaft when these members are in their operative positions. In the illustrated machine elimination of this clearance is accomplished by providing notched connections between the head and the shaft, the connections being so formed. as to wedge the interfitting parts of the head and shaft into engagement with each other when these members are in their operative positions. v

'In edge setting machines wherein a tool headis axially and rotatably mounted on an oscillating shaft, resilient means are provided for yieldingly urging those members together so as to retain them in their operative position and yet allow them; to be moved relatively .toone; another in chines when operated at ahigh speed. It is an order. that the head may be rotated to bring different tools into edge setting positionl If the resilient means should break while the machine is oscillating at a high speed and thus allow the tool holder to fly out from the shaft, it would be likely to injure the operator aswell as damage the machine. Accordingly, a feature of this invention lies in the provision. of -means for preventing an accidental separation of the head from the shaft. This means, as illustrated herein,

consists of a retaining member which extends [OF ICE- P through'the shaft and into, engagement with the a V Fig. 2 is a plan view of the tool head andvshifting fork shown in Fig.3;v

Fig. 3 is a side view partly in section of the I tool head and its oscillating shaft; v

Fig. 4 is a plan view of the head of the tool operating shaft;

Fig. 5 is a sectional View of the head shown in Fig. 4 taken along lines V,-V;

Fig. 6 is a view illustrating the mounting means for the spiral springs shown in Fig.3;

Fig. 'Ijis a. sectional View taken along lines VII-V11 of'Fig..3; Q

Fig. 8 is a sectional view taken along the lines VIII-VIII of Fig. 3;

Fig. 9 is a diagrammatic view,partly in section,

showing the position of the tool head spindle as the lugs on the tool head enter the notches in the head of the operating shaft at the end of the tool head shifting operation, the clearance between the tool head parts and the operating shaft and the proportions of the lugs and notches being exaggerated for the purpose of illustration; and

Fig. 10 is a view. similar to- Fig. 9 showing the position of the tool head spindle when the lugs on the tool head are finally seated in the notches inthe head of the operating shaft.

In setting shoe sole edges it is customary to use two .edgesettin'g irons, one for setting the sole edge around the forepart of the shoe and the other for setting the reduced edges in the shank portion of the sole. Accordingly, edge setshifting fork 32 for shifting the burnishing tool's successively into edge setting position. The tool.

head shifting mechanism disclosed herein is well known in the art and is fully described inLetters Patent of the United States No. 1,986,968, granted January 8, 1935, upon an applicationfiledin the name of W. Hamann, to which reference may be had for a detailed description of this mechanism.

The burnishing tools H! are attached to tool retaining spindles rotatably mounted in oppositely extending recesses in the tool holder l2. The inner, ends of these spindles are slotted to receive portions of flat springs l4, the ends of which engage shoulders l3, formed on the tool holder l2 at either side of the spindle receiving recesses. The springs are retained in the slots in the spindles by set screws 39 (Fig. 3) which are located at the inner end of the spindles and. extend into clamping engagement with the springs. These springs permit a limited rotation of the spindles in the recesses in the tool holder jso as to permit the tools carried by the spindles to follow the changes in curvature of sole edges. Upon the disengagement of. the sole edges from the tools, the springs return the tools to their normal sole edge engaging positions. The tool carrying spindles are yieldingly urged outwardly by balls l6 (Fig. 2) seated in recesses in the inner ends of the spindles. These balls are bored to receive the inner ends of springs I8 coiled about studs I! fixed to the shoulders I3 on the tool head. The outer ends of the springs I8 are hooked about pins 19 (Fig. 6) carried by washers 20 which are adjustably mounted on thestuds l! the washers 20 being above the springs H3. The upper faces of these washers are serrated so as to cooperate with the opposedserrated faces on' adjoining washers 2| (Fig. 6) which are non-rotatablymounted on the studs H. The washers 20 are also providedwith recesses 39 for the reception of an appropriate adjusting tool. The springs and washers are held in assembled'relation 0n the studs. by nuts 22, threaded on the ends of the studs l'L- The force exerted by each spring I.8 on its too] retaining spindle may be varied by thev operator by adjustingthe tension in thespring by rotating the washer 20, the washer being retained inanyadjusted position by the locking washer 2!. As is evident from the disclosure in Fig. 1, the adjustable washers 2!] are located on the tool head in such a manner as to be readily accessible to the operator so as to permit him to varythe pressure on the spindles to suit the type .of soles he is operating upon.

The tool head I2 is provided with a pairof oppositely disposed depending lugs 21, 2! which are received in a pair of notches 36, 3'! formed in the side walls of a cup-shaped head 26 on the'oscillating shaft 25, thus providing a positive driving connection for thetransmission of oscillating movement from the'shaft 25 to the tool head. The tool head is also provided with a 'hollow axially disposed depending spindle 23 H which are slidablyan'd' which is slidably and rotatably received in an opening 24 in the oscillating shaft 25. Mounted in the opening in the shaft 25 between the side walls of the shaft and the spindle 23 is a bearing sleeve 28 which extends beyond the spindle '23 and is provided with a roller bearing 40 at its inner end. The tool head is urged intov engagement with the head 26 of the oscillating shaft by a spring 35 which extends through the opening in the spindle 23 '(Fig. 3), and is con nected at one end by a member 29 to the bearing A E! .in the sleeve 28, and at the other end to the tool'holder by a member 43 which engages a; U-shaped washer 3i seated on the head. This spring permits the shifting fork 32 to move the tool holder outwardly from the drive shaft until the lugs 21'have cleared the side walls of the notches 36,- 3'! and are moved on to the inclined shoulders 38 on the head of the operating shaft so as to permit the shifting of the tool head to bring another tool into edge set-' ting position. Provision is. made for preventing the separation of the tool head from the oscillat ing shaftin the event of breakage of thelspring 38. This consists in the provision of a peripheral groove 33 (Fig. 3) in the tool head spindle 23 which receives a locking pin 34. Thelocking pinv 34 extends through the side walls of the shaft 25 and bearing sleeve 28 and is retained 'i'nengagement with the groove inthe's'pindle I by a split spring 35 which surrounds the shaft 25. The width of the peripheral groove in the spindle is. greater than the depth of the notches in the head 26, thus permitting the spindle to be moved outwardly from the drive shaftsufiiciently for the lugs 2! to clearthe notches 36, 31 in the side walls so as to permit the head to be rotated in order to shift theburnishing tools. Further movement of the spindle is prevented by the engagement of the pin 34 vwith the lower:

end wallof the peripheral groove'33.

. In order to permit free axial and rotative movement of the spindle 23 in the sleeve 28 clearance must be allowed between these members. the machine has been operated for a time, this clearance is increased by wear on the spindle and sleeve due to the frequentv shifting of the tool After head. The clearance between the spindle and f sleeve hasbeen found to be the cause of con-- siderable vibration in the tool head and shaft when the tool head and shaft are oscillated at high speeds. To eliminate the effectof this clearance and thus reduce .the vibration-of the machine during. edge setting operations and thereby allow the edge setting tool to be ope-- 3;

atedat higher speeds, the connections between the head of the drive shaft and the lugs on",

the tool head have been so formed that. movement of these members toward one another under the influence of the spring 30 will cause the toolhead to move laterally with respect to the shaft 25 thereby moving the tool head spindle 23 ing' side wall 41' of the notch 31 is inclined'or" wedge shaped, as is shown in Fig. 4. The effect arsomos of this arrange'menti' can :best be =1'1ndersto0d by referring to Figs. 9 and 10 which are diagram theilugs enter the notches in the head of the I matic views" on an exaggerated scale illustrating the relative positions of the tool head lugs, tool head-spindle and operatingshaft as '(Fig. 9)

operating shaft and when (Fig. 10) the lugs are. finally seated in the notches. As' the lugs 21,12? on-the tool head first enter the notches ing completely around the spindle 23. After the lugs have entered'thenotches 35, 31 the inclinededge portion4-4 'of the lug in the notch will ride down onthe inclined surface 4| (Figs. 8 and 10) under theurging of the spring I 39 thus causing a further movement of the lugs into the notches. This movement will continue .until the tool head has reached the position shown in Fig. 10 where the lug 21 in the notch I engages the face 52 of that notch at X and the spindle 23 is pressed against the sleeve 28 the lug in the notch 31. downwardly on the inclined side wall M thereby wedging the spindle 23, againstthe sleeve'28. When the lugs 21, 21'

are finally seated in the notches 3B, 37 there remains a clearance between the lugs and one Wall of the notches which is indicated by the letters D and E in Fig. 10. This clearance permits the lug in'the notch 3'! to ride further downward on the inclined wall M (Fig. 8) as'wear develops in the spindle 23 and sleeve 38 and thus provides for their continued wedging engagement during. the period when they are in their operative positions.

The shaft'25 is rotatably mounted in a bearing 35 supported bya machine frame 46, and may be oscillated by any suitable means such, for example, as that illustrated in Letters Patent ofthe United States No.'1,'743,480, granted January 14, 3.930, in'the name of E. J. Ray. I

When it is desired to change tools, the tool holder, as viewed in Fig. 3, is moved outwardly from the shaft by the shifting fork 32 until the lugs 2'! engage the shoulders 38 on the head of the oscillating shaft after which it is automaticallyrotated to shift the tools in a mannerfully described in the above-mentioned patent to I-Iarnann No. 1,986,968.v I

Having described my invention, what I claim as new and desire to secure by Letters Patent of the I United States is:

1. In a finishing machine, an oscillating tool holder having a recessed head, a tool retaining spindle mounted for rotative movement in the recess in said head, and a spring extending transversely to the longitudinal axis of the spindle, said spring having an intermediate portion thereof positively connected to the tool spindle and its end portions engaging adjacent sections of said head whereby rotation of said spindle is resisted .by said spring.

2.'In a finishing machine, an oscillating tool holderhaving a recessed head and abutments adjacent to the recess in the head, an aperturedtool retaining spindle mounted for rotative movement in the recess in said head, and a spring engaging saidabutrnents and extending into the aperture in the tool retaining spindle for resisting rotation of the spindle and for limiting the extent of such rotation. w i

3. In' afinishin-gim'achine, an oscillating tool holder: having a recessed head, a tool retaining spindle mounted for axial movement-in the recess in said head, .a post offset from the axis of said spindle, a spiral spring mounted on said post, said spring having an extending portion arranged for "engagement with the spindle, and means for adjustably connecting. the spring to the post.

whereby the'forceexerted by the spring on the spindlemay be varied. i

4.111 a finishing machine, oscillating tool holder having a'recessedhead and a spring support, said spring support beinglocated to one side of the recess, a tool retaining spindle mounted for axial movement in the recess in said head, a spring arranged to urge the spindle outwardly in said recess, and means for adjustably connect ing the spring to the spring support whereby the force exerted by the spring on the spindle may be varied. I

5; In a finishing machine, a tool holder having a recessed head, a slotted tool retaining spindle mounted for axial and rotative movement in said recess, a spring extending through the slot in said spindle and having its ends in engagement with adjoining portions of the head thereby to resist rotation. of the spindle in the recessand a spiral spring mounted on said headwith its axis offset from the axis of said spindle, said spring having an offset portion arranged to urge said spindle outwardly from said head.

6. In a finishing machine, a recessed oscillating shaft, atool holder mounted for axial and rotative movement in the recess in said shaft, resilient means for resisting axial movement of said shaft and said holder relative to one another, and

means for limiting the extent of the relative axial movementof the shaft and the holder in the event of breakage of said resilient means. i

'7. In a finishing machine, an oscillating shaft, a tool "holder mounted for axial and rotative movement on said shaft, and connections between said holder and said shaft constructed and arranged to move them into Wedging engagement with one another to prevent vibrations of said holder relatively to said shaft.

8. Ina finishing machine, a recessed oscillating shaft, a tool holder mounted for axial and rotative movement on said shaft, said tool holder including a shank extending into the recess in said shaft, and connections between said tool holder and said shaft constructed and arranged to press said shank against a portion of said shaft thereby to prevent vibration of the shank in the recess.

. 9. In a finishing machine, an oscillating shaft, a holder for a plurality of tools mounted for rotation on the shaft whereby they may be successively brought into operative position, means for releasably locking the holder to the shaft comprising connections therebetween, said connections being constructed and arranged to displace said (holder relatively to the shaft a distance equal to the shaft to the holder in its different operative positions, said means comprising extensions on i said holder and recesses on said shaft arranged to receive said extensions, said recesses being 'wider than said extensions and one of said recesses being provided with an inclined surface arranged for engagement with the extension entering that recess whereby the extension entering that recess is moved an additional distance thereby moving; the holder relatively to the shaft and forcing the 10 spindle into engagement with the shaft. 1 

